<template>
  <div class="app">
    <h3>我是App组件</h3>
    <Suspense>
      <template v-slot:default>
        <Child></Child>
      </template>
      <template v-slot:fallback>
        <h3>稍等，加载中...</h3>
      </template>
    </Suspense>
  </div>
</template>

<script>
// import Child from './components/Child.vue'
import { defineAsyncComponent } from 'vue';//静态引入
const Child = defineAsyncComponent(() => import('./components/Child.vue'))//异步引入
  export default {
    name: 'App',
    components: {Child},
    
  }
</script>

<style>
  .app {
    background-color: gray;
    padding: 10px;
  }
</style>